was wondering if they are any good

Jet Stg 1 PCM
BBK Underdrive Crank Pulley
Air Foil

and is it beneficial to put the B&M shift improver kit in the valvebody plus a B&M ShiftPlus electronic shift improver....or is it one or the other


sorry for the newb questions

 

imo the airfoil and shift imrover kit is fine but the other stuff is just a waist,,,if u need to upgrade ur PCM then get a tune by PCMFORLESS for example. under-drive pullys never did much on LT1s but since its a simple mod it wont hurt to try

 

I've also heard that you need an alternator overdrive pulley with underdrive pullies. I Have an air foil cause it came with the elbow. I wouldn't buy one by itself. I went with a pcmforless tune and am very happy with it.